The London 2012 gymnastics schedule is getting closer and closer to winding down, and it seems that with every day that goes by, American star Gabby Douglas pops up with another chance to win a medal.

Unfortunately, the 16-year-old—who has already garnered gold in the team all-around competition and in the individual all-around—couldn't be the star of the show yet again on Monday, when she failed to medal in the uneven bars final. She needed a spectacular performance to match that of Russia's Aliya Mustafina and, instead, she submitted her worst performance of the summer.

Monday also marked the end of the men's rings competition and the men's vault.

Here's a closer look at how it all went down during the finals on Monday, including the medalists' scores and complete results from the full field. You can see the full results of Monday's gymnastics events here.

Men's Rings Final—Medalists

Medal

Name

Nation

Score

Gold

Arthur Nabarrete Zanetti

Brazil

15.9

Silver

Chen Yibing

China

15.8

Bronze

Matteo Morandi

Italy

15.733

Men's Rings Final—Full Results

Place

Name

Nation

Score

1

Arthur Nabarrete Zanetti

Brazil

15.900

2

Chen Yibing

China

15.8

3

Matteo Morandi

Italy

15.733

4

Aleksandr Balandin

Russia

15.666

5

Denis Ablyazin

Russia

15.633

6

Tommy Ramos

Puerto Rico

15.6

7

Iordan Iovtchev

Bulgaria

15.108

8

Federico Molinari

Argentina

14.733

Rings Highlight: Arthur Nabarrete Zanetti

Ronald Martinez/Getty Images

For the endurance of the event, China's Chen Yibing seemed to have the win in the bag after setting the bar high with the first performance, scoring a 15.8. The biggest contributor to his high score? The fact that he was one of very few competitors to execute a perfect dismount from the apparatus. So many of the rings contenders—including Argentina's Federico Molinari and Bulgaria's Iordan Iovtchev—lost points for stumbles and slight hops coming off the rings, but Yibing was perfect.

Alas, he wasn't as perfect as fourth-qualifier Zanetti, who went dead last and beat Yibing by 0.1 points, registering the upset of the event.

Yibing—who scored a whopping 16.525 in the rings qualification—was content to sit back and wave to the crowd while he waited for his gold medal to roll in. One by one, his competitors' scores paled in comparison to his own. In a cruel twist of fate, it wasn't until the last second of the competition—when the judges announced Zanetti's score—that it all fell apart for him.

Now, heading into Rio 2016, Yibing's work is cut out for him—as is Zanetti's.

Women's Uneven Bars Final—Medalists

Medal

Name

Nation

Score

Gold

Aliya Mustafina

Russia

16.133

Silver

He Kexin

China

15.933

Bronze

Beth Tweddle

Great Britain

15.916

Women's Uneven Bars Final—Full Results

Place

Name

Nation

Score

1

Aliya Mustafina

Russia

16.133

2

He Kexin

China

15.933

3

Beth Tweddle

Great Britain

15.916

4

Yao Jinnan

China

15.766

5

Viktoria Komova

Russia

15.666

6

Elisabeth Seitz

Germany

15.266

7

Koko Tsurumi

Japan

14.966

8

Gabby Douglas

USA

14.9

Women's Uneven Bars Highlight: Aliya Mustafina

Phil Walter/Getty Images

Right off the bat, China's He Kexin—the 2008 gold medalist—was primed to give Gabby Douglas major trouble. Her execution on the bars was perfect, as was the dreaded landing. Her final score of 15.933 was even more impressive when you consider the pressure she was under: not only did she perform first, but until her routine on the bars. China had yet to medal in artistic gymnastics this summer.

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She was upstaged, however, by Russia's Aliya Mustafina, whose truly perfect routine included zero penalties and carried a difficulty level of 7.0, earning her a 16.133. It was quite a comeback for the Russian star, who missed the 2011 World Championships after tearing ligaments in her knee.

The biggest disappointment of the day went to the U.S.'s Douglas, who lingered around the low 15's on the bars throughout the Olympics and needed the routine of her life in order to contend with either Mustafina or Kexin.

Unfortunately, she picked Monday to submit her worst performance on the bars of the summer after getting caught out of position midway through her routine. It amounted to big deductions, and she finished with the worst overall score of 14.9.

Men's Vault Final—Medalists

Medal

Name

Nation

Score

Gold

Yang Hak Seon

Korea

16.533

Silver

Denis Ablyazin

Russia

16.399

Bronze

Igor Radivilov

Ukraine

16.316

Men's Vault Final—Full Results

Place

Name

Nation

Score

1

Yang Hak Seon

Korea

16.533

2

Denis Ablyazin

Russia

16.399

3

Igor Radivilov

Ukraine

16.316

4

Tomas Gonzalez

Chile

16.183

5

Sam Mikulak

USA

16.050

6

Isaac Botella Perez

Spain

15.866

7

Flavius Koczi

Romania

15.633

8

Kristian Thomas

Great Britain

15.533

Men's Vault Final Highlight: Yang Hak Seon

It's hard to imagine that the competition for the men's vault final could've been tighter.

The best, however, was saved for last. Reigning world champion Yang Hak Seon, who took two huge steps to finish his first vault—which carried a 7.400 degree of difficulty—still managed to earn a 16.466. His second vault, and the last of the night, earned him a whopping total score of 16.533 for the gold.

Russia's Denis Ablyazin had quite a day on Monday, participating in the men's rings final and the vault final, which occurred just over an hour apart. On the rings, he registered a decent performance, finishing fifth—but on the vault, he was far better, particularly on his second vault. He was perfect in the air, and even a slight stumble on his finish didn't hurt him as he registered a 16.399 to take the silver.

He beat out Ukraine's Igor Radivilov, whose double front on his first vault earned him a 16.4 and contributed to his overall score of 16.316.

Meanwhile, the U.S.'s only hope at a medal on the apparatus, Sam Mikulak, registered a solid 16.050, which was good for the bronze at the time. He couldn't hold on to it after Chile's Tomas Gonzalez and Yang Hak Seon both upstaged him.